Refrigerating apparatus



1 G. F. WOELFEL REFRIGERATING AyP nAwus Original Filed Jan. 10, 1929 2 Sheets-Sheet 1 Patented-Oct. 22 1935 if 2,018,589 v 1 UNITED STATES Q i OFFICE i" p 2.61am v om" r. Woelfel, m. aaaignor-to The Commercial Clearing Corporation, Jachonville, Fla, a corporation of Florida Application January 16, mo, Serial 110.881,"!

Renewed November 20, 1,84

- 1s (cue-1:1) Thisinvention relates to refrigerating apparafit against the inner faces of the side and end 'tus, and-more particularly to a flow restrictor or walls ll and ll of the outer element. The inner orifice for use in connection with refrigeratingelement is provided in its periphery with a spiral systems, V-shaped groove It which is extremely acute so l Orifices,asiswell known, areemployed forthe that it is of'greater depth than width. 6

Y purpose of separating the high and'low' sides of One end'of this groove communicates with a such systemsand at present are of two general longitudinally extending groove il opening types, one in, which the orifice is a simple one through the outer face of the end wall II where. and the other in which'the orifice is in the form it communicates with a radial groove'il formed in of a tube of the desired dimensions? Of. the two in such wall and terminatin! at h N4 1 there- 1 types, the latter is the most practical in small of a pit it formed by spotting with a drill.

I refrigerating systems, for it permits,to a certain This pit centrally aligns with an outlet opening extent, measurement of the rate of fiow from the 20 formed in the center of the end wall It of 'highto the low side and due tothe lengthof the the outer member. The opposite end of the it 'tube. wear does not have such a marked effect groove communicates with the interior of the the amount of refrigerant which is passed. inner member through an orific'e II.

Such tubes, however,-where of the usual con- The inner member Ii is of less depth than the str'uction. are subject to rapid deterioration, are socket of the outer member and against the end practically impossible to cle'an if they become of the sidewall of the inner member andwithin 80 clogged and with the small size of the orifice the outer'memher are seateda plurality of lead provided, are difilcult and costly to produce. An separator rings 22 which are alternated with important object of this invention is to produce screens 13; and "which are of increasing an orifice for use in such situations, which is so mesh size as they recede from the inner memconstructed that it may be readily cleansed. may bet. The end ofthe side-wall of the outer memll be very readily and cheaply produced, and may her is offset-outwardly, as at 28, providing in- 25 be readily associated with screens to prevent teriorly a seat 21 for a combined packer and sepclogging thereof. I arator 28, which clamps the edges of the screen A further obiect of the invention is to produce 2 and likewise serves as a packing element for a device of this character which may, when dethe sealiof the inner end of the outer member sired, be very readily combined "with a receiver Iii. As aconvenientmeans of attaching this seal, into which the condenser of the system dishereinafter more specifically to be referred to, charges. the outer wall at the offset portion is threaded, These and other objects I attain by the conas at"; g struction shcwnin the accompanying drawings, The seal or closure referred 'to actually proll. wherein for the purpose of illustration is shown vides a means for conducting the condensed rew a preferred embodiment of 'my invention and frigerant to the orifice and may be in any one Whereinzof a number of forms. The forms thereof are -1 is a semi-diagrammatic side elevation herein illustrated and in that shown in Figures of refrigerating apparatus embodying an orifice 1 and 2. the seal comprises a receiver or chamber D constructed in accordance with my invention; 3!" communicating directly with a condenser ii i Plgure 2 is a view partially in longitudinal secand of greater capacity than the inner member tion through one type of orifice; II to contain a considerable quantity of the con- Figure 3 is anenlarged sectional view theredensed refrigerant received from the condenser.

-thr0u8h p Thischamberhasanopenendflwhichis I Figure 4 is a view similar to'that of Figure 2 closed by the structure hereinbefore recited. In 4 showing a modified form of orifice; j Figure 4, the seal is simplyin the form of a cap 5 is a view in endelevation of the inner or plate 88 centrally provided with a threaded element of the orifice, and opening permitting connection thereto, of a con- Figure 6 is a perspective view of this orifice denser pipe orof a pipe leading from the con- '0 element; denser. Ina structureof either character, where 50 Referringnow more particularly to the drawthe orifice is located at a point remote to the low ings, the numerals II and II designate teiescopside or actual refrigerating'unit of the system, a icaliy engaged cu'p shaped elements so eonvery fine pipe N is employed to conduct restructed that the outer faces of the side and'end frigerant to such low side..

ll wallsllandiloftheinnerelementhav'eaclose. It willbeobviou's thatadevice ofthischar-li tage over the tube structure in that, in event of clogging, it may be very readily cleaned, as it may readily have associatedtherewith screens, reducing the chances of clogging to a minimum. By forming the groove so that it is deep and narrow, the frictional resistance to passage of fluid therethrough is materially increased, so that the size of this groove may be made greater than would ordinarily be possible without passing too great gan amount of the fluid.

Since the construction hereinbefore set forth is capable of a certain range of change and modification without materially departing from the spirit of the invention, I 'do not limit myself to such specific structure except as hereinafter outer member and closure communicating with opposite ends of the passageway, the inner member being of less depth than the outer member, separator ringsseated upon the end of the. side wall of the inner member and clamped thereagainst by said closure, and screens having their edges inserted between adjacent separators.

2. An expansion device for refrigerating appa ratus comprising telescopic cup-shaped members,

one wall of one member having a groove cooperatingwith the opposite wall of the other member to provide a passageway, a closure for the mouth of the outer member, openings in the outer member and closure communicating with opposite ends of the passageway, the inner member being of less'depth than the outer member,

' separator rings seated upon the end of the side wall of the inner member. and clamped thereagainst by said closure, and screenshaving their edges inserted between adjacent separators, said closure. comprising a receiver for the discharge from the condenser.

- 3. An expansion device for refrigerating apparatus, comprising a cup-shaped member having an outlet'opening in a wall (thereof, a second cupshaped member located in said first member, the side wall of one of said members having a spiral groove cooperating with the side wall 'of the other of said members to provide a spiral passageway. ,;ommu nicating atone end with said outlet opening and at the other end with the interior of said. second member, and means closing the mouths of said members and having an' inlet opening connecting with the interior of said second member. 4. An expansion device for refrigerating apparatus, comprising a cup-shaped member having an outlet opening in the end wall' thereof, a

second cup-shaped member located in said first member, the side wall of one of said members having a spiral groove cooperating with the side wall of the other of said members to. provide a s'pir'al passageway, the end wall of one of said members being provided with a radial groove establishing communication between one end of said spiral passageway-and said outlet opening, said second member being provided in the side wall thereof with an opening establishing communication between the other end of said spiral passageway and the interior of this member, and

, of the passage.

' acter has all of the advantages of the tube and simple orifice and additionally has the advanmeans closing the mouths of said members and having an inlet opening communicating with the interior of said second member.

'5. An expansion device for refrigerating apparatus, comprising a cup-shaped member having 5 an outlet opening in the end wall thereof, a second i cup-shaped member located in said first member, said second member being provided in its side wall with a spiral groove cooperating with the side wall of the other of said members to provide a spiral 10 passageway, said second member being provided in its end wall with a radial groove establishing communication between one end of said passageway and 'said outlet opening and said second member being provided in its side wall with an 15 orifice establishing communication between the other end of said passage and the interior of this member, and means closing the mouths of said member and havingan outlet opening communicating withthe interior of said second member.

6. An expansion device for refrigerating appa-v ratusxcomprising a cup-shaped member having an outlet opening in a wall thereof, a second cupshaped member located in said first member, one of said members being provided in a wall thereof 25, with a spiral groove cooperating with the oppos-- ing wall of the other member to providea passageway communicating with the interior of said second member and with said outlet opening, and means removably secured to said outer member 3 for closing the mouths of said members and securing said second member in place and provided with an inlet opening communicating with the interior of said second member.

7. Anexpansion device for refrigerating appa- 35.

ratus, comprising a cup-shaped member having an outlet opening in a wall thereof, a second cupshapedimember located in said first member, one of said members being provided in a wall thereof with a spiral groove cooperating with the opco posing wall of the other member to provide a passageway communicatingwith the interior of said second member and with said ofitlet opening, said second member being shorter than said first member, a screen located in said first memu I ber across the mouth of said second member, and means for closing the mouth of said first member and securing said second member and screen in place and providedwith an opening communicating with the interior of said second member 50- I through the screen,

8. An expansion device, comprising two bodies having opposed contacting faces, one of saidfa'ces having a spiral groove therein, the opposing face of the other body being smooth throughout and 65 forming with said groove a spiral passage, means securing said bodies together, inletmeans communicating with one end of said passage, and outlet means communicating with the other end of.

said passage.

9. An expansion device, comprising two bodies having opposed contacting faces, one of saidfaces having a spiral groove therein, the opposing face of the other body being smooth throughout and forming with said groove a spiral passage, a mem- 65 her threadedly coupled with one of said bodies and securing the two bodies together, said member having an inlet communicating with one endof the passage, and. an outlet for the other end 10, An expansion device, comprising two bodies having opposed contacting face one-of said faces having a spiral groove therein, t e opposing face of the other body being smooth throughout and forming with said groove a spiral passage, a 7

member threadedly coupled with one of said bodies and securing the bodies together, said member having an inlet, an inlet for one end of said passage in communication with the inlet of said membei', a screen interposed between said inlets, and an outlet for the other end of the passage.

11. An expansion device, comprising two circular bodies having opposed contacting surfaces, one of said surfaces having a groove therein, the opposing face of the other body being smooth throughout and overlying and forming with said groove a relatively long passage, means securing the two bodies together, means forming an outlet for one end of said passage, and means providing an inlet for the other end of the passage.

12. An expansion'device, comprising two circular bodies having opposed contacting surfaces, one of said surfaces having a spiral groove therein, the opposing siu'face of the other body being smooth throughout and forming with said groove a spiral passage, the body having the spiral groove therein having a central opening which is in communication with one end of the passage, a member detachably connected with the said other body and covering the central opening of the groove carrying body, said member having means for the coupling of a tube therewith, and means for coupling a tube with the saidother body for communication with the other end of the spiral P 8 13. An expansion device, comprising two circular bodies having opposed contacting surfaces, one of said surfaces having a spiral groove therein,- the opposing surface of the other body being smooth throughout and forming with said groove a spiral passage, the body having the spiral groove therein having a central opening which is in communication with one end of the passage, a member detachably connected with the said other body and covering the central opening of the groove carrying body, said member having means for the coupling of a tube therewith, means for coupling a tube with the said other body or communication with the other end of the spiral pas- 20 sage, and a screen interposed between the said member and the grooved body and secured in position over thesaid central opening of the grooved body by the said member.

GEORGE 1'. wow.

CERTIFICATE or CORRECTION.

Patent No. 2,018,589. October 22. 1935.

GEORGE r. WOELFEL.

It is hereby certified that the name of the' assignee in the above numbered patent was-erroneously written and printed as ,"The Commercial Cleaning Corporation" whereas said name should have been written and printed as The Commercial Clearing Corporation, as shown by the records of assignments in this office; and that the said Letters Patent should be read with this correction therein that the same may conform to the record of the case in the Patent Office.

Signed and sealed this 26th day of- November,'A. D. 1935.

Les 1 ie Frazer (Seal) Acting. Commissioner of Patents. 

